This is my solution. Its advantage is that it doesn't check which pattern that matched afterwards. Instead it registers which pattern that matched during the match. 

my @strs = qw/
    ABCBXBCA
    APCBXBCAC
/;
my @patterns = (qr/B.B/, qr/CB/); # See comment below.

my $matched_pattern;
my $all_pats = do {
    use re 'eval';
    qr/(.*?)(?:@{[join '|', map "$patterns[$_](?{\$matched_pattern = $
+_})", 0 .. $#patterns]})/;
};

foreach (@strs) {
    print "String:$_ Pattern:$patterns[$matched_pattern] KeyWord:$1\n"
        if /$all_pats/;
}

[download]
I use qr// around all the patterns in the assignment to @patterns in this code. That is to avoid slip-ups involving \s and such (for double-quoted strings). However, doing that is a slight compile-time performance hit in this case since I never use the patterns directly, just indirectly. But I like to qr// them anyway, especially if it is an important piece of code. (And besides, you get a FREE and FUN non-capturing parenthesis around it! :))

Cheers,
-Anomo

In reply to Re: First Pattern Matching by Anonymous Monk
in thread First Pattern Matching by artist

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.